[Travis] do specify removed brew option

Author: mwarusz

.travis.yml

@@ -109,7 +109,7 @@ install:
     # hdf5
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install  -o Dpkg::Options::="--force-confdef" -o Dpkg::Options::="--force-confold" libpango-1.0-0 libpangocairo-1.0-0 libhdf5-dev; fi
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install hdf5-tools; fi
-    - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew install hdf5 --with-cxx; fi
+    - if [[ $TRAVIS_OS_NAME == 'osx' ]]; then brew install hdf5; fi
 
     # gnuplot-iostream
     - if [[ $TRAVIS_OS_NAME == 'linux' ]]; then sudo $apt_get_install gnuplot-nox; fi